Some good choices. Limbo is currently on sale in the Humble Bundle [1] (along with a bunch of other great games), if you want to try it.<p>FiftyThree (iPad app) looks really polished and fun to use, though I don't have a stylus. Is it still a stellar drawing app if you are just using your fingers?<p>[1] <a href="http://www.humblebundle.com/" rel="nofollow">http://www.humblebundle.com/</a>